The sequence (14) – (24) – (24) –(14) is not properly speaking an example of remote pairs but it is just as easy to spot and has exactly the same effect: 1 may be eliminated from any common associate of r5c2 and r8c1. Here the result is again to place 8 in r9c2.

This is indeed a chain. Still, if other DB chains are as straightforward as this, I for one should be keen to see a few more examples. Thanks again.